#include "A.h"
#include <iostream>

class C : protected A
{
public:
	void print()
	{
		//cout<<"a = "<<a; //err
		std::cout<< "b = " << b << std::endl; // ok 
		std::cout<< "c = " << c<< std::endl; //包含的，在子类的内部能被使用 //ok
	}
};
